Hugo, The easiest way to check if IS is basically working is by just looking through the viewfinder. Press and release the shutter bottom halfway and you should see the IS kicking in and shutting off with some delay.
Robert > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hugo Lopes > > I have the chance to buy a used 100-400/4.5-5.6L IS in mint condition. > However, when I tested the lens with the IS on, I didn't notice any > vibrations or any noise from the IS. Is this normal? I once tried > the 28-135 > IS and I could feel the vibrations and the the "humm" noise from > the IS. The > lens is really mint, but if the IS is not working properly, it just isn't > worht buying. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
